DURABILITY TEST OF THERMAL SPRAYED Al-Mg ALLOY COATING BY USING GRINDING SURFACE TREATMENT

Abstract

Corrosion protection of steel structures is a key for a long-term use of them and blast cleaning is generally used as surface preparation in recoating a deteriorated paint coating of steel bridges. However, when the blast cleaning is not available due to environmental limitations and any other reason, alternative surface preparation and corrosion protection technique are to be adopted. Then, focused on in this study is a new corrosion protection technique using thermal Al-Mg alloy sprayed coating by using grinding treatment together with high permeable sealing agent, not by the blast cleaning. Durability of the technique is verified through adhesion test and accelerated corrosion test up to 1,200 cycles.